Android - 如何以编程方式更改 ImageButton 的宽度？

发布于 2024-11-09 13:40:39 字数 486 浏览 3 评论 0原文

我有一个图像按钮。代码是 -

ImageButton shareButton = new ImageButton(this);
shareButton.setBackgroundResource(android.R.drawable.ic_menu_share);

RelativeLayout.LayoutParams shareParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
shareParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, navigationLogo.getId());

shareButton.setLayoutParams(shareParams);

我需要改变它的宽度。但是 ImageButton 和布局参数中都没有 setWidth 方法。网上查了很多都没有答案。

原文

I have an ImageButton. The code is -

ImageButton shareButton = new ImageButton(this);
shareButton.setBackgroundResource(android.R.drawable.ic_menu_share);

RelativeLayout.LayoutParams shareParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
shareParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, navigationLogo.getId());

shareButton.setLayoutParams(shareParams);

I need to change its width. But there is no setWidth method in both ImageButton as well as the layout params. Looked a lot online without an answer.

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霓裳挽歌倾城醉 2024-11-16 13:40:39

您可以使用实际数字，而不是使用relativelayout.WRAP_CONTENT作为宽度，该数字将是按钮的新宽度（以像素为单位）。由于您可能希望将 dp 中的宽度指定为与分辨率无关，因此您可能需要使用如下方法将 dp 转换为像素：

public static int dpToPixels(Context context, float dp) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (dp * scale + 0.5f);
}

Instead of using the RelativeLayout.WRAP_CONTENT for the width, you can use an actual number, which will be the new width of the button in pixels. Since you probably want to specify the width in dp to be resolution-independent, you will probably need to convert dp to pixels, with a method such as the following:

public static int dpToPixels(Context context, float dp) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (dp * scale + 0.5f);
}

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习ぎ惯性依靠 2024-11-16 13:40:39

试试这个。

ImageButton shareButton = new ImageButton(this);
shareButton.setBackgroundResource(android.R.drawable.ic_menu_share);

RelativeLayout.LayoutParams shareParams = new RelativeLayout.LayoutParams(
        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
shareParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, navigationLogo.getId());
shareParams.width = INTEGER_NUMBER;
shareButton.setLayoutParams(shareParams);

Try this.

ImageButton shareButton = new ImageButton(this);
shareButton.setBackgroundResource(android.R.drawable.ic_menu_share);

RelativeLayout.LayoutParams shareParams = new RelativeLayout.LayoutParams(
        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
shareParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, navigationLogo.getId());
shareParams.width = INTEGER_NUMBER;
shareButton.setLayoutParams(shareParams);

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